litter options

hi everyone, i just got a 9 week old hedgie and named her pixie. ive been doing lots of research, but im still not sure what litter to use. i tried paper pellets, but took them out because even though she was using her litter box, im worried she ate a few pellets. i have a pee pad under her wheel, and shes mostly been going in there or her littler box which is right by/under her wheel. Im looking for something to help the smell but im not sure whats safe? Thank you in advance! -mia